133444140 has 24 divisors (see below), whose sum is σ = 373643760. Its totient is φ = 35585088.

The previous prime is 133444133. The next prime is 133444141. The reversal of 133444140 is 41444331.

It is a self number, because there is not a number n which added to its sum of digits gives 133444140.

It is not an unprimeable number, because it can be changed into a prime (133444141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1111975 + ... + 1112094.

It is an arithmetic number, because the mean of its divisors is an integer number (15568490).

Almost surely, 2^133444140 is an apocalyptic number.

133444140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133444140 is an abundant number, since it is smaller than the sum of its proper divisors (240199620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133444140 is a wasteful number, since it uses less digits than its factorization.

133444140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224081 (or 2224079 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 133444140 is about 11551.8024567597. The cubic root of 133444140 is about 511.0144360667.

Adding to 133444140 its reverse (41444331), we get a palindrome (174888471).

The spelling of 133444140 in words is "one hundred thirty-three million, four hundred forty-four thousand, one hundred forty".